287879669 has 16 divisors (see below), whose sum is σ = 359303040. Its totient is φ = 224079360.

The previous prime is 287879651. The next prime is 287879677. The reversal of 287879669 is 966978782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 287879669 - 2¹⁶ = 287814133 is a prime.

It is a super-2 number, since 2×287879669² = 165749407647099122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287879629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109037 + ... + 111645.

It is an arithmetic number, because the mean of its divisors is an integer number (22456440).

Almost surely, 2^287879669 is an apocalyptic number.

It is an amenable number.

287879669 is a deficient number, since it is larger than the sum of its proper divisors (71423371).

287879669 is a wasteful number, since it uses less digits than its factorization.

287879669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060.

The product of its digits is 18289152, while the sum is 62.

The square root of 287879669 is about 16967.0170919935. The cubic root of 287879669 is about 660.2934637704.

The spelling of 287879669 in words is "two hundred eighty-seven million, eight hundred seventy-nine thousand, six hundred sixty-nine".